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  1. dragos12

    V-notch ball vs regular ball

    Thanks Gentlemen, do you think that solid content in the fluid may be in favors of v-ball or vice versa?
  2. dragos12

    V-notch ball vs regular ball

    Dear Gents, may I receive your comments about reason to select V-Notch ball valve for an on-off application instead of a regular one? V-notch would have longer lead time and cost. However maybe operation of it can be easier, less-torque etc. Thanks for sharing.
  3. dragos12

    PFA lined valves

    I was wondering about lining procedure of different valves. Is there a norm or guide that you can share? I could never find one. Beside Class 300 pfa lined valves are not common or limited to 6". Anyone could advice why there is a size limit?
  4. dragos12

    Coker Valves

    Thanks Danlap and Gerhardl for input. So acc. to your experiences, you verify that ball valves are better than plug valves for such dirty, high temp and high cycle operation like coker?
  5. dragos12

    Coker Valves

    As I investigated , earlier plug valve were used in coker plants. Then ball valves became more common.(why?) Beside complex operation function of plug valve looks like weak point and 2 actuator requirement. (for turn and lifting) So I try to understand why users began to prefer ball after a...
  6. dragos12

    Coker Valves

    I am trying to understand the major 2 solutions for coker line : ball and plug valves. Beside licensor specs, does plant switch from ball to plug? Or they follow initial specs which were prepared by the licensors? It looks like biggest advantage of plug valve is inline maintenance capability...
  7. dragos12

    Franklin Duaseal valve

    If you define corrosive environment they can apply necessary coating. SS Body can also be provided but with high prices and long lead times. Dirty service ia wide scope. Better to be specific. Like RVAmeche mentioned mostly used in Oil&Gas. Storage, crude oil, refinery, terminals etc. SEaling...
  8. dragos12

    UOP Approval

    Dear All, does anyone have UOP Approved Valve Manufacturer Vendor list for HF or FCC etc applications?
  9. dragos12

    GEST 06/318 EuroChlor

    It is valid and still in use. GEST is only recommendations for Chrlorine and related applications.
  10. dragos12

    Sub-sea air valve

    LittleInch & RVAmeche thanks for time and caring. We can consider like starting from zero and reaching to 30-35 meters depth at the end of the pipeline. It will be sea outfall for cooling water discharge. Purpose is similar to a land pipeline, to protect the pipeline. Beyond supplying it, I...
  11. dragos12

    Sub-sea air valve

    Dear Experienced ones, I was asked to supply an air valve to be used an deep sea water discharge pipeline. Valves to be used along the pipeline thus air valve to operate undersea. Acc. to me, I never saw such application and can not imagine that there is a design like this. Did you ever see...
  12. dragos12

    HCl Application

    Moltenmetal, thanks again for your valuable time and words. You are right however this is not for an application in my country and I am afraid no pro-metallurgist in my country can comment even close to what you write. Appreciate your input and experience !
  13. dragos12

    HCl Application

    thanks molenmetal, however I could not still reach to a point that I am sure C276 or 625 is better for the application. Acc. to Haynes website, as concentration of HCL increases, c276 has better corrosion rate than 625. Any final comments?
  14. dragos12

    HCl Application

    One further point, could you compare C276 and Alloy 625? Could we say C276 is superior to 625?
  15. dragos12

    Control Valve - Choked Flow

    Thanks a lot, it is a turbo expander application, correct.
  16. dragos12

    Control Valve - Choked Flow

    Littleinch, thanks for your time and wording. Finally I learnt that choked flow for gas is not a big issue.Only negative result is noise which should be reduced.
  17. dragos12

    Control Valve - Choked Flow

    Sorry , here you go...http://files.engineering.com/getfile.aspx?folder=ba6f4b82-67a0-4e3b-836b-aeb096c8adb4&file=sizing.jpg
  18. dragos12

    Control Valve - Choked Flow

    I am sorry, I just did not want to ruin your time, Thanks to your request, pls. see sizing page. Biggest size is 20 inch and does not matter if I quote 16" or 20" , does not have impact on results. I am thinking that the process is asking for choked flow. (for some lines they ask for flashing...
  19. dragos12

    Control Valve - Choked Flow

    I was asked to quote a control valve and it is resulting with choking conditions. Beside changing process conditions, do you see a way to solve it? I mean to have flow with choking.
  20. dragos12

    Control Valve - Choked Flow

    Yep it is V-Port Ball Control Valve.

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